Jack Nicklaus described why Tiger was so dominant back in the late 90's. He said Tiger would show up at the golf course 2 hours before anyone else, and then after the round while everyone else was going home to thier families or making dinner plans Tiger would be the last person on the range, hitting his 300th 7 iron of the evening because his approach at #17 had landed 3 feet to the left and 2 feet farther than he wanted it to.
Now Tiger only plays select tournaments, he shows up at the same time as everyone else, and he heads to the car and off to meet his girlfriend or out to speaking engagements etcetc right after his round.
Quite basic, he is playing less and practicing less, and therefore he is now merely one of the top golfers not The BEST.
...and a fat wallet! He isn't hungry!